Question: What was the ordinal series for William Lyon Mackenzie King during his position held as Prime Minister of Canada?
Paraphrase: Where does Prime Minister Mackenzie King fall in the line of Canadian leaders?
SPARQL (Wikidata): SELECT ?value WHERE { wd:Q128633 p:P39 ?s . ?s ps:P39 wd:Q839078 . ?s pq:P1545 ?value}